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  {
   "cell_type": "markdown",
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   "source": [
    "# Exporting Trajectories\n",
    "\n",
    "<img align=\"right\" src=\"https://anitagraser.github.io/movingpandas/assets/img/movingpandas.png\">\n",
    "\n",
    "[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/anitagraser/movingpandas-examples/main?filepath=1-tutorials/4-exporting-trajectories.ipynb)\n",
    "[![IPYNB](https://img.shields.io/badge/view-ipynb-hotpink)](https://github.com/anitagraser/movingpandas-examples/blob/main/1-tutorials/4-exporting-trajectories.ipynb)\n",
    "[![HTML](https://img.shields.io/badge/view-html-green)](https://anitagraser.github.io/movingpandas-website/1-tutorials/4-exporting-trajectories.html)\n",
    "\n",
    "Trajectories and TrajectoryCollections can be converted back to GeoDataFrames that can then be exported to different GIS file formats."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import pandas as pd\n",
    "import geopandas as gpd\n",
    "from geopandas import GeoDataFrame, read_file\n",
    "from shapely.geometry import Point, LineString, Polygon\n",
    "from datetime import datetime, timedelta\n",
    "import movingpandas as mpd\n",
    "\n",
    "import warnings\n",
    "warnings.filterwarnings('ignore')\n",
    "\n",
    "mpd.show_versions()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "gdf = read_file('../data/geolife_small.gpkg')\n",
    "traj_collection = mpd.TrajectoryCollection(gdf, 'trajectory_id', t='t')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Converting TrajectoryCollections back to GeoDataFrames\n",
    "\n",
    "### Convert to a point GeoDataFrame"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "traj_collection.to_point_gdf()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Convert to a line GeoDataFrame"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "traj_collection.to_line_gdf()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Convert to a trajectory GeoDataFrame"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "traj_collection.to_traj_gdf(wkt=True)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exporting to GIS file formats"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "These GeoDataFrames can be exported to different file formats using GeoPandas, as documented in https://geopandas.org/docs/user_guide/io.html"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "export_gdf = traj_collection.to_traj_gdf(wkt=True)\n",
    "export_gdf.to_file(\"temp.gpkg\", layer='trajectories', driver=\"GPKG\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "read_file('temp.gpkg').plot()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "read_file('temp.gpkg')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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